Metroplex is a giant Autobot from the Transformers franchise.To give you an idea of how giant, he transforms into a city.

Jaegers and Kaiju are massive.For scale purposes, Jaeger heads are large enough to hold 2 pilots, several technical devices and still have space to walk around in.Gypsy Danger is the blue mech, Knifehead is the green Kaiju on the other side.